negative facial expression

• 负性面部表情

negative facial expression的用法和样例：

例句

1. These are usually persistent, uncontrollable, slow or jerky facial or body moements that can be caused by all medications of this type.
   通常为持续性不自主的缓慢或急动性面部或躯体运动，所有的该类药物都可能导致这种情况。